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An amorphous Co-carbonate-hydroxide nanowire array for efficient and durable oxygen evolution reaction in carbonate electrolyte

Abstract

Development of earth-abundant catalysts toward high-efficient and durable oxygen evolution reaction (OER) electrocatalysis in carbonate electrolyte is in great demand but remains a huge challenge. In this communication, we describe the development of Co-carbonate-hydroxide nanowire array on nickel foam (CoCH/NF) via in-situ electrochemical conversion of Co(CO3)0.5(OH)•0.11H2O nanowire array. When utilized as a 3D catalyst electrode for OER in 1.0 M KHCO3 (pH: 8.3), as-formed CoCH/NF demands overpotential of only 332 mV to drive a geometrical catalytic current density of 10 mA cm-2, with its catalytic activity being maintained for at least 130 h. Impressively, it also demonstrates a high turnover frequency value of 0.22 mol O2 s-1 at overpotential of 500 mV.

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Publication details

The article was accepted on 06 Oct 2017 and first published on 09 Oct 2017


Article type: Communication
DOI: 10.1039/C7NR07269D
Citation: Nanoscale, 2017, Accepted Manuscript
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    An amorphous Co-carbonate-hydroxide nanowire array for efficient and durable oxygen evolution reaction in carbonate electrolyte

    M. Xie, L. Yang, Y. Ji, Z. Wang, X. Ren, Z. Liu, A. M. Asiri, X. Xiong and X. Sun, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR07269D

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